function setFocus(id){
	for (i=0;i<document.getElementById("menu").getElementsByTagName("li").length;i++){
		if ("tab_"+i == id){
			document.getElementById(id).className="menu_selected";
			document.getElementById("content_"+i).className="content_selected";
		}else{
			document.getElementById("tab_"+i).className="menu_unselected";
			document.getElementById("content_"+i).className="content_unselected";
		}
	}
}

function switchCSS (id,css){
	document.getElementById(id).href="css/" + css;
	
}


